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| Description: A mapping is a class of ordered pairs. |
| Ref | Expression |
|---|---|
| fssxp |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | frn 3639 |
. . . 4
| |
| 2 | ssid 2083 |
. . . . 5
| |
| 3 | ssxp 3262 |
. . . . 5
| |
| 4 | 2, 3 | mpan 697 |
. . . 4
|
| 5 | 1, 4 | syl 10 |
. . 3
|
| 6 | fdm 3637 |
. . . 4
| |
| 7 | xpeq1 3206 |
. . . 4
| |
| 8 | sseq1 2085 |
. . . 4
| |
| 9 | 6, 7, 8 | 3syl 20 |
. . 3
|
| 10 | 5, 9 | mpbird 196 |
. 2
|
| 11 | frel 3636 |
. . 3
| |
| 12 | relssdr 3519 |
. . 3
| |
| 13 | sstr2 2074 |
. . 3
| |
| 14 | 11, 12, 13 | 3syl 20 |
. 2
|
| 15 | 10, 14 | mpd 26 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: funssxp 3644 opelf 3646 fabexg 3659 dff4 3822 dff2 3823 fopabssxp 3830 mapex 4334 mapval2 4341 mapsspw 4347 uniixp 4363 infmap2 7583 lmbrf 7927 iscauf 7936 iscau5 7938 iscaunns 7941 lmclimnn 7961 h2hcau 8844 h2hlm 8845 1alg 10625 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 964 ax-gen 965 ax-8 966 ax-10 968 ax-11 969 ax-12 970 ax-13 971 ax-14 972 ax-17 973 ax-4 975 ax-5o 977 ax-6o 980 ax-9o 1125 ax-10o 1142 ax-16 1212 ax-11o 1220 ax-ext 1462 ax-sep 2708 ax-pow 2748 ax-pr 2785 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-ex 983 df-sb 1174 df-eu 1384 df-mo 1385 df-clab 1467 df-cleq 1472 df-clel 1475 df-ne 1590 df-v 1815 df-dif 2052 df-un 2053 df-in 2054 df-ss 2056 df-nul 2284 df-pw 2406 df-sn 2416 df-pr 2417 df-op 2420 df-br 2625 df-opab 2672 df-xp 3190 df-rel 3191 df-cnv 3192 df-dm 3194 df-rn 3195 df-fun 3198 df-fn 3199 df-f 3200 |